Dbx iEQ 31 User Manual download pdf (Page 4)

The compressor/limiter/gate shall have two identical chan-

nels, each with an audio frequency response of 20Hz to

20kHz, +0/-0.5dB, an electronically floating balanced input

impedance of not less than 40kΩ, balanced and 20kΩ unbal-

anced, and a maximum input level of not less than +22dBu

and 1/4" TRS and XLR connectors. The output shall have an

impedance of no more than 120Ω balanced or 60Ω unbal-

anced with a maximum output level of not less than +20dBm,

into a minimum load impedance of 600Ω and 1/4" TRS and

XLR type connectors. The unit shall also have a sidechain

detector with an input impedance of not less than 10kΩ

unbalanced, a maximum input level of not less than +24dBu

and a maximum output level of not less than +21 dBu bal-

anced or unbalanced and an output impedance of not more

than 2kΩ balanced and 1kΩ unbalanced. Sidechain input

jack shall be a 1/4" TS jack; sidechain output shall be a 1/4"

TRS jack.

Total Harmonic Distortion plus Noise shall be less than 0.1%

with any amount of compression (up to 40dB) at 1kHz and

Intermodulation Distortion shall be less than 0.1% SMPTE.

The unit shall have an Equivalent Input Noise level of not

more than -96dBu unweighted, and a dynamic range of not

less than 118dB. Output gain adjustment shall be variable

from -20 to +20dB. The compression threshold range shall

be variable from -40 to +20dBu and compression ratio shall

be variable from 1:1 to ∞:1. The peak limiter threshold range

shall be variable from +4 to +24dBu. The compressor attack

and release times shall be selectable for either program

dependent or manually adjustable, scalable, program depen-

dent operation. The compression ratio characteristic shall be

selectable for either the hard or soft knee curve type with a

maximum compression of no less than 60dB. The

expander/gate shall have a threshold of -∞ to no less than

+15 dBu, an attack time of no more than 100µsec, a program

dependent release time and a downward expansion ratio vari-

able from 1:1 to 8:1. All input, output and control signals

shall be via the rear panel. The stereo link shall be of the true

RMS summing type with Channel 1 as the master when

linked. The unit shall have the following front panel switch-

es for each channel, with each switch incorporating an inte-

gral LED to signal selection of that switch: Sidechain

Monitor, Sidechain Bypass, OverEasy, Contour, Auto, I/O

Meter, and Bypass. There shall also be one Stereo Link

switch. Each channel shall have the following identical con-

trols: expander/gate Threshold, expander/gate Ratio, com-

pression Threshold, compression Ratio, compression Attack

time, compression Release time, Output Gain, limiter Threshold; and the following identical metering and indicator LEDs for each channel: Below/Above gate threshold, Below/

At/Above compression threshold, Gain Reduction (12 LEDs), Input or Output Level (8 LEDs), peak limiter active. There shall be a rear panel switch for each channel to select

nominal input and output operating levels at -10dBV or +4 dBu. The unit shall be capable of accepting one compatible audio transformer installed for each channel. The power

requirements shall be 100-120VAC 50/60Hz or 200-240VAC, 50/60Hz, 20W, via a detachable IEC type AC cable. The size of the unit shall be 1.75" x 19" x 7.9"

(4.4cmx48.3cmx20.1cm) with a net weight of 5.11 lbs (2.3 kg) and a shipping weight of 7.5 lbs (3.4 kg). The 1U high, full rack width stereo compressor/limiter/gate shall be a dbx 1066.

COMPRESSOR / LIMITER / GATE

1066

A Harman International Company

Input

Connectors: XLR and 1/4" TRS (Pin 2 and tip hot)

Type: Electronically balanced/unbalanced, RF fil-

tered

Impedance: Balanced > 50 kOhm, unbalanced > 25

kOhm

Max Input Level: > +24 dBu balanced or unbalanced

CMRR: Typically > 50 dB at 1 kHz

Outputs

Connectors: XLR and 1/4" TRS (Pin 2 and tip hot)

Type: Servo-balanced/unbalanced, RF filtered

Impedance: Balanced 120 Ohm, unbalanced 60 Ohm

Max Output Level: > +21 dBu, > +20 dBm

Sidechain Input

Connector: 1/4" TS

Type: Unbalanced, RF filtered

Impedance: > 10 kOhm

Max Input Level: > +24 dBu

Sidechain Output

Connector: 1/4" TRS (tip hot)

Type: Impedance balanced, RF filtered

Impedance: Balanced 2 kOhm, unbalanced 1 kOhm

Max Output Level: > +21 dBu balanced or unbalanced

System Performance

Bandwidth: 20 Hz to 20 kHz, +0/0.5 dB

Frequency Response: 0.35 Hz to 90 kHz, +0/-3 dB

Noise: < -96 dBu, unweighted, 22 kHz measure-

ment bandwidth

Dynamic Range: > 118 dB, unweighted

THD+Noise: 0.008% typical at +4 dBu, 1 kHz, unity

gain

0.08% typical at +20 dBu, 1 kHz, unity

gain

< 0.1%, any amount of compression up to

40 dB, 1 kHz

IMD: < 0.1% SMPTE

Interchannel Crosstalk: < -80 dB, 20 Hz to 20 kHz

Stereo Coupling: True RMS Power Summing™

Compressor

Threshold Range: -40 dBu to +20 dBu

Ratio: 1:1 to

∞

Threshold Characteristic: Selectable OverEasy® or hard knee

Attack/Release Characteristic: AutoDynamic™

Attack/Release Modes: Selectable Manual or Auto

Manual Attack Time: Scalable program-dependent

Manual Release Time: Scalable program-dependent

Auto Attack Time: Program-dependent

Auto Release Time: Program-dependent

Output Gain: -20 to +20 dB

Limiter

Threshold Range: +4 dBu to +24 dBu (off)

Ratio:

∞

Limiter Type: PeakStopPlus™ two-stage limiter

Stage 1: PeakStop® brickwall limiter

Attack Time: Zero

Release Time: Zero

Stage 2: Predictive intelligent program limiter

Attack Time: Program-dependent

Release Time: Program-dependent

Expander/Gate

Threshold Range: Off to +15 dBu

Ratio: 1:1 to 30:1

Attack Time: < 100 µsec

Release Time: Program-dependent

Function Switches

SC Ext: Routes the external sidechain input signal

to the detector.

SC Mon: Routes the sidechain signal to the output,

interrupting the normal audio.

OverEasy®: Activates the OverEasy® compression

function.

Contour: Activates the frequency-dependent detec-

tor function.

Auto: Activates automatic program-dependent

attack and release times, disabling the

manual Attack and Release controls.

I/O Meter: Switches between monitoring input and

output levels on the Input/Output Level

meter.

Bypass: Activates the direct input-to-output hard-

wire relay bypass. Relay automatically

hard-wire bypasses unit at power-down

and provides a power-on delay of 1.5 sec.

Operating Level (rear panel): Switches the nominal operating level

between -10 dBV and +4 dBu simultane-

ously for both input and output levels.

ST Link: Links both channels for stereo operation.

Channel One becomes the master.

Indicators

Gain Reduction Meter: 12-segment LED bar graph at 1, 2, 4, 6, 9,

12, 15, 18, 21, 24, 27 and 30 dB

Input/Output Meter: 8-segment LED bar graph at -24, -18, -12,

-6, 0, +6, +12, and +18 dBu

Compressor Threshold Meter: 3-segment LED bar graph at Below (-),

OverEasy®. and Above (+)

Exp/Gate Threshold Meter: 2-segment LED bar graph at Below (-) and

Above (+)

Limiter, Thershold Meter: 1 LED to indicate PeakStopPlus™ limiting

Function Switches: LED indicator for each front-panel switch

Options

Output Transformer

Per Channel: Jensen®JT-123-dbx or JT-11-dbx, BCI™

RE-123-dbx or

RE-11-dbx

Power Supply

Operating Voltage: 100-120 VAC 50/60 Hz 200-240 VAC

50/60 Hz

Power Consumption: 20 Watts

Fuse: 100-120 VAC: 250 mA Slow Blow

200-240 VAC: 125 mA Type T

Mains Connection: IEC receptacle

Physcial

Dimensions: 1.75"Hx19"Wx9"D

(4.4cmx48.3cmx20.1cm)

Weight: 5.1 lbs (2.3 kg)

Shipping Weight: 7.5 lbs. (3.4 kg)

CHANNEL ONE CHANNEL TWO

EXPANDER / GATE LIMITERCOMPRESSOR

1066

Compressor/

Limiter/Gate

GAIN REDUCTION dB INPUT / OUTPUT LEVEL dBuTHRESHOLDTHRESHOLD THRESHOLD

THRESHOLD RATIO

4:1

10:1

6:1

1:1

2:1

3:1

PeakStopPlusOUTPUT GAINTHRESHOLD

-20

-10 +10

+20

SC Enable

SC Mon

OverEasy

Contour Auto I/O Meter Bypass

Stereo

Couple

EXPANDER / GATE LIMITERCOMPRESSOR

GAIN REDUCTION dB INPUT / OUTPUT LEVEL dBuTHRESHOLDTHRESHOLD THRESHOLD

SC Enable

SC Mon

OverEasy

Contour Auto I/O Meter Bypass

RATIO RELEASE

-24 -18 -12 -6 0 +6 +12 +18-24 -18 -12 -6 0 +6 +12 +18

24 212730 1815129642124 212730 18151296421

THRESHOLD RATIO OUTPUT GAINTHRESHOLD ATTACKRATIO RELEASE

-40

-20

+15

OFF

-60

dBu

2:1

4:1

3:1

1.2:1 8:1

1.4:1

1.6:1

PROFESSIONAL PRODUCTS

-20

-10 +10

+20

.35

1 .15

.04

dB/mSec

4:1

10:1

6:1

1:1

2:1

3:1

2:1

4:1

3:1

1.2:1 8:1

1.4:1

1.6:1

OFF

+16

+12

dBu

OFF

+16

+12

dBu

-40

-20

+15

OFF

-60

dBu

-10

+20

+10

-40

-30

-20

dBu

ATTACK

.35

1 .15

.04

dB/mSec

250

125 12.5

dB/Sec

250

125 12.5

dB/Sec

-10

+20

+10

-40

-30

-20

dBu

PeakStopPlus

CHANNEL ONE

SIDECHAIN

OUTPUTS INPUTS

SENDRETURN

OPERATING

LEVEL

+4 dBu

-10 dBV

CHANNEL TWO

SIDECHAIN

OUTPUTS INPUTS

SENDRETURN

OPERATING

LEVEL

+4 dBu

-10 dBV

PIN1 / SLEEVE

PIN 2 / TIP +

PIN 3 / RING

PIN1 / SLEEVE

PIN 2 / TIP +

PIN 3 / RING

FOR MORE INFORMATION CONTACT:

dbx Professional Products • 8760 S. Sandy Pkwy. • Sandy, Utah 84070

Phone (801) 568-7660 • Fax (801) 568-7662 • Int’l Fax (801) 568-7583

[email protected] • http://www.dbxpro.com

dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.

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